Overview
The TLV803SDBZR is a 3-pin voltage supervisor (reset IC) produced by Texas Instruments. It is part of the TLV8x3 family of supervisory circuits, designed to provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems. The device is available in a 3-pin SOT-23 package and is characterized for operation over a temperature range of –40°C to +125°C. It features an active-low, open-drain reset output and supports supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 3-pin SOT-23 |
| Supply Current | 9 µA (Typical) |
| Supply Voltage Monitoring | 2.5 V, 3 V, 3.3 V, 5 V |
| Power-On Reset Generator Delay Time | 200 ms (Typical) |
| RESET Output | Active-Low, Open-Drain |
| Temperature Range | –40°C to +125°C |
| Threshold Voltage Assertion | V DD exceeds 1.1 V during power-on |
Key Features
- Precision supply voltage monitoring with fixed sense-threshold voltages set by an internal voltage divider.
- Power-on reset generator with a fixed delay time of 200 ms to ensure proper system reset.
- Open-drain, active-low RESET output that can be pulled up to a maximum voltage of 6 V.
- Pin-for-pin compatibility with MAX803 and alternate pinouts available through TLV853 and TLV863).
- Low supply current of 9 µA (typical), making it suitable for low-power applications).
- Ability to monitor multiple supplies by directly tying multiple TLV803 outputs together for a logical OR-ing function).
Applications
- Circuit initialization and timing supervision for DSPs and processor-based systems).
- Monitoring of multiple power rails to ensure system stability and reset if any rail falls below the threshold voltage).
- Level shifting of the output to match the logic levels of the load, even if the monitored voltage is lower).
- Use in systems requiring low-power consumption and precise voltage monitoring, such as industrial control systems, embedded systems, and IoT devices).
Q & A
- What is the primary function of the TLV803SDBZR?
The primary function of the TLV803SDBZR is to provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems, through precise supply voltage monitoring and power-on reset generation).
- What package type is the TLV803SDBZR available in?
The TLV803SDBZR is available in a 3-pin SOT-23 package).
- What are the supported supply voltages for the TLV803SDBZR?
The TLV803SDBZR supports supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V).
- What is the typical delay time for the power-on reset generator?
The typical delay time for the power-on reset generator is 200 ms).
- How does the RESET output of the TLV803SDBZR behave?
The RESET output of the TLV803SDBZR is active-low and open-drain, which can be pulled up to a maximum voltage of 6 V).
- Can multiple TLV803SDBZR devices be used to monitor multiple power rails?
Yes, multiple TLV803SDBZR devices can be used to monitor multiple power rails by directly tying their outputs together for a logical OR-ing function).
- What is the temperature range for the TLV803SDBZR?
The TLV803SDBZR is characterized for operation over a temperature range of –40°C to +125°C).
- How does the TLV803SDBZR handle bidirectional reset pins on microcontrollers?
For bidirectional reset pins, a series resistor should be placed between the output of the TLV803SDBZR and the RESET pin of the microcontroller to protect against excessive current flow).
- Is the TLV803SDBZR compatible with other devices?
Yes, the TLV803SDBZR is pin-for-pin compatible with MAX803 and has alternate pinouts available through TLV853 and TLV863).
- What is the typical supply current of the TLV803SDBZR?
The typical supply current of the TLV803SDBZR is 9 µA).
